Scored wallboard



Nov. 22, 1193s. H. E MAR-SH 2,137,896

SCORED WALLBOARD Filed Feb. 24, 1958 in v i M l WW I 1s 1" Qbhrr/jlfamlz and it will be seen that sharp corners as shown at I! areproduced at the edges of this groove,

When the coating ll of paint, lacquer, enamel, or

board causing itto expand adjacent to'the grooves which causes thecoating material to separate from the wall board. It is to overcome thisdiihculty and to produces. satisfactory and fool-proof product thatapplicant has produced the present invention.

In carrying outthe invention as shown in Figs. 1, 2, and 3, the groovesII which represent the mortar joints between individual tiles, areformed at properly spaced intervals and in two series at right angles toeach other in order to produce the efiect of individual tiles ll of thedesired size and shape divided by the grooves i5 representing the mortarjoints between tiles.

The invention pertains entirely to the particular shape and constructionof these grooves which may be formed by means of a specially designedcutting or grinding tool which produces a flat or slightly curved bottomwall l1, straight or slightly rounded side walls IO, and rounded cornersl9,, thusdoing away with-any sharp outer comers over which the paint orother coating is to be app i In finishing the surface of the wall board,a coating of paint or other coating material of any desired color isapplied to the entire outer surface of the board as indicated at 20. Thesurface of this coating material may be bufi'ed or otherwise polished toproduce the desired finish and coating material or the like of adifferent color as indicated at II is applied within each of the groovesII, the vertical walls I. of the grooves confining the same within adefinite area so as to produce the representation of a mortar joint ofuniform width throughout its length.

It will be seen that the coating of paint or the like upon the roundedcorners II at the sides of the grooves will be of substantially the samethickness as the coating 2| upon the flat surfaces of the wall board,thus thoroughly protecting bottom wall and substantially straight sidewalls terminating in rounded corners merging into the flat surface ofthe board, which permits a coat of coating material to be built insubstantially uniform thickness upon said outer flat surface of theboard and over said rounded-corners in order to reduce or eliminate thepenetration of moisture at these points, and permitting a stripe ofcoating materialtobelaidonthebottomwall ofeach' groove and extending inthe bottom of the groove to each side wall thereof. e 2. A tile scoredwall board comprising a flat surface wall board having integral squareblocks on the face thereof, the blocks divided by grooves,

each groove having rounded corners at its edges and curved surfacesextending from said rounded corners and merging into the fiat surface ofthe blocks, which permits a coat of coating material to be built insubstantially uniform thickness upon said fiat finish surface of theboard and over said rounded corners of the'grooves.

3. A tile scored wall board comprising a fiat surface wall board havinggrooves in its finish surface, each groove having a substantially fiatbottom wall and substantially straight side walls terminating in roundedcorners and curved surfaces extending from said rounded corners andmerging into the flat surface of the board, which permits a coat ofcoating material to be built in substantially uniform thickness uponsaid outer flat surface of.-the board and over said rounded corners inorder to reduce or eliminate the penetration of moisture at thesepoints, and permit- ,ting a stripe of coating material to be laid on thebottom wall of each groove and extending in the bottom of the groove toeach side wall thereof. tatilescoredwallboardcomprisingafiat surfacewall board having grooves in its finish surface, each groove having sidewalls terminating in rounded corners merging into the fiat surface ofthe board which permits a coat of coating material to be built insubstantially uniform thickness upon said fiat finish surface of theboard and over said rounded corners of the grooves.

HARRY E. MARSH.

